Data Set Specifications (DSS) are metadata sets that are not mandated for collection but are recommended as best practice. It is recommended that, if collecting data for the purposes of primary patient care, planning or analysis, the entire DSS be collected.This metadata set is primarily concerned with the clinical use of CV-data. It could also be used by a wider range of health and health-related establishments that create, use or maintain, records on health care clients.The collection of cardiovascular data (CV-data) in this metadata set is voluntary.The definitions used in CV-data are designed to underpin the data collected by health professionals in their day-to-day practice. They relate to the realities of a clinical consultation and the ongoing nature of care and relationships that are formed between doctors and patients in clinical practice.